Quantity-regulating device for rotary fluid-compressors.



A. HUGUENIN.

QUANTITY REGULATING DEVICE FOR ROTARY FLUID commnssons. APPLIOATION FILED NOV. 6, 1907.

91 6, 1 56 Patented Mar. 23, 1909.

2 SHEETS-SHEET 1.

\u "A 0 km A. HUGUEN IN.

QUANTITY REGULATING DEVICE FOR ROTARY FLUID GOMPRESSORS.

APPLICATION FILED NOV 5, 1907 Patented Mar. 23, 1909.

2 SHEETS-SHEET 2.

' UNITED snares. PATENT ()FFICE.

ALBERT HUGUENIN, OF-ZUBICH; SWITZERLAND.

To .all whorrriii may ,cpncer' ri;

I queen QUANTIm r l/EGULAT-ING DEVIGE= EQR; BQTxARY- FLUID- COMPRESSORS.

Specification of-Letters Patent.

Patented March 23, 1909.

Application file d November 5, 1997. Serial ;N.o. 400,809.

Be 1t known thgat I, Apnnnr. IlUGUENIN of Zurich, Swjtzerlapd, a citizen of Swite ng and. h s ne t-fissrlres s. 3 nlrer lti r tr sse, u c w tze a d have invented anew anduseful Im roved. Quan i y-R lati g e ice er p ry a-idfi m re s. f wh c he l n is the speci cation. 7

The regulation of the quantity of fluid sup plied to arotary compressor c an he eiiected y throttling or by the, so-called quantity regulation, In the, first n eth oda resistance. is simply introducedinto the path of the workin ,fluid, i. e., generally at the outlet fro 1n t e compressor; whereby a smaller 'ty' is supplied according to ,the reductlon oftire cross sectional areaito the Outlet. As however the internal dimensions, or diameterof all the, essentialparts of the com; Pre se itself em in e ac y h me, whi there'lative Speeds; are everywhere changed in proportion to the .quantit delivered, this leads, on the one hand, to s 'ocks at all the changes of direction owing, to. the wrong angles, and on the otherhand the speed wi vary in an irregular manner with; the, resultjumpsof pressure, which irre ularities 3 i aiiect the efficiency in a very unavorable.

manner. T he principle. of the, quantity regulatmg device, unlike that just described, con- SiStSlIl the fact that the cross-sections of the I most essential parts are proportioned to the quantities to be conveyed at. the time, in such manner that the normal speed is always. maintained whereby a constant efficiency is insured. In the case of: fl-uid compressors such regulating devices are best mounted in the diffuser as themost important factors in the speed phenomena reside there.

According to this invention a quantity I regulating device for a rotary fluid comressor comprises diffuser blades made to fit etween the inner parallel portion of the cheeks of the diffuser while in the outer divergent ortion thereof they have a clearwe're; the lades have outer slotted guides and also lateral pins arranged on their inner ends and engaging with the circumferentially adjustable ring in the cheek and they can be freely moved between the cheeks so that the inclination of the compressor slot can be \adaptedto the quantlty to be delivered while the blade always. remainsstraight and i the innerportion of-t e difi'user qanal is come Eletely closed except through the conduits etwee the lades.

In the accompanying drawings which,

illustrate by way of: example one.construc-, tion of the quantity regulating device e m bodying this. invention: Figurel is an ele vation of-part of the compressor and regulating device; Fig. 2 is a transverse section of. the same; Fig.3 is a separate view. of one of.-

the regulating blades; Figs. 4 and 5,illustrate the pivot pins for the same; Figs 6.

and 7 illustrate slotted guides for the blades;

and Fig. 8 illustrates in section the means for.

shiftin the blades.

In -ig. 2 [a and a, are the two cheeksof' the diffuser which start'ng from the compressor conduit first remain for a certain distance parallel to each other. and then. diverge in order to obtainthe total desiredincrease, of cross-section in the. shortest possible radial dimension, The. dimensions of the diffuser blades b, shaped as shownin Fig.3, are. such that in ,the innenpart of the diiiuser they just touchlthe, walls thereotso that they can be moved in a circumferential:

direction, and their width is greatly increased toward the outer-circumference. of the, diffuser. On the boss or projection c of each blade, is mounted a, slotted pin,

(Figs. 4 and 5) which is secured. by small rivets. These pins engage. with corresponding p erforationsin' the ringre. which is ar:v

ranged near the outlet from the, compressor conduitalong. the. whole circumference. The,

diffuser blades 1; are further guided at their outer ends=in slotted guides f consisting/of suitably out sheet. metal ;strips and :slotted; screwthreaded pins engagin these strips 6 and 7.

at'their ends as'shown in i These slotted guides f serve at t e same time to secure the cheek a, to the frame part a which at the same time forms the other cheek of the diffuser. At suitable points around the ring 6 pins 9 (Fig. 8) are screwed into it and by their aid the ring can be moved to and fro in a circumferential direction.

The operation of this quantity regulating device is as follows :If the compressor delivers at full load, the blades are in the osition indicated by the full lines, that is to say, they give the maximum cross-section at blades.

to be delivered the ring 6 is turned in the the inletfrom the compressor conduit, and the largest possible angle of inclination of the To arrange for smaller quantities direction opposite to that of the rotation of the wheel,- that is to say, to the left in Fig. 1,

and the dotted position of the blades represents any desired position to which these maybe brought. The inlet space between the inlet edges of the blades, and ,also the angle which the'blades make with the cir cumference of the ring e are considerably reduced, both of which conditions are adapted to a decreased delivery. .Thesocalled width of slot, that is to say, the radial distance between the outletedge of the wheel blades and the inlet edge of the diffuser blades has been left practically unchanged, and each difiuser blade remains as before absolutelystraight which is of special importance having regard to the speeds obtaining inthese devices. As will be clearly understood in the dottedosition a greater amount of the inner para lel portion of the blades lies between the parallelarts of the cheeks than in the other position. For each I position of the blades when shifted in the direction to reduce the cross-section of the fluid conduit, .the lateral clearancebetween the blade and the cheeks will be smaller than for the position of maximum crosssection. The limit of displacement of the ring e, and'of the blades, is determined by the position inwhich the edges of the blades coincide with the cheeks, and it is therefore in the power of the desi er to bring the reduction in sired degree.

The advantage which is inherent to this quantity regulating device is that with a constantl'y rectilinear blade and a constant distance between the compressor blades and the regulating blades, the angles and the areas of conduits are proportioned to the quantities to be delivered, whereby the best efliciency is insured. 'As a practical advantage the decided simplicity and facility of erection may be cited.

This uantity regulating device can be s mple or multiple rotary comused wit pressors.

quantity delivered to any de- What I do claim, and desire to secure by Letters Patent of the United States, is:

1. In a rotating compressor the combination with rectilinear blades limited by parallel lines toward the inside and by diverging lines toward the outside, of diffuser cheeks of corresponding form and means of varying the angle of. inclination of the blades, substantially as described.

corresponding form and slotted guides in pins rotatably secured to the cheeks and inner pins near the inner ends of the blades, said pins being arranged on a rotatable ring, substantially as described.

'4. In a rotating compressor the combination with rectilinear blades limited by paral-,

lel lines toward the inside and by diverging lines toward the outside, of diffuser cheeks 0t corresponding form and slotted guides .lo-'

cated in pins rotatably secured to the cheeks and means to rotate the blades on said pins, substantially as described.

5. In a rotating compressor the combination with rectilinear blades limited by parallel lines toward the inside and by diverging lines toward the outside, of diffuser checks of corresponding form and. slotted. guides for the blades and inner ins near the ends of the blades which are .pro on ed beyond the pins, said pins being arrange on arotatable ring, substantially as described.

. In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses. v

g ALBERT HUGUENIN.

Witnesses A. LIEBERKNEOHT, ALTO WrEsBANn. 

